Actually, I've discovered that QNX v6.4 does auto mount the AmigaOS XL CD whenever it is placed in the drive.
Using the QNX file manager, you can see the contents of the disk if you navigate to the fs folder and then to the cd0 folder.
However, I have so far been unable to locate the QNX v6.4 package installer utility.
I think all I have to do to get AmigaOS XL installed is to locate the package installer and point it at the AmigaOS XL package stored my CD.
If you find out wher they've hidden it, let me know